Abstract
To improve the shift performance of transmission in electric vehicles, the shift strategy using combined hydraulic clutch/brake and motor coordination control is obtained. Considering the pure electric drive vehicle motor and two-speed planetary gearbox system, the dynamic analysis of shifting process was carried out, and proposed the coordinated control method between motor and clutch/brake in the shifting process. Also, the motor torque with PI regulation synchronize master and driven parts speed, when the shifting clutch and brake are not combined, and make master and driven parts speed reach the target speed difference before the clutch/brake begin to combine. The joint simulation model of shifting process and control was built in the MATLAB/Simulink and AMESim simulation platform. The results show that the model is capable of evaluating the shifting process coordination control effect and the shifting control strategy can effectively reduce the transmission output shaft torque fluctuation and friction work, and improve shift quality.
| Original language | English |
|---|---|
| Pages (from-to) | 142-147 |
| Number of pages | 6 |
| Journal | Journal of Beijing Institute of Technology (English Edition) |
| Volume | 23 |
| Publication status | Published - 1 Dec 2014 |
Keywords
- Combined hydraulic clutch/brake
- Coordination control
- PI regulation
- Shifting process
- Simulation